ventral fin

ventral fin

n.

A fin, such as a pelvic fin or an anal fin, that is found on the ventral side of a fish.

Thesaurus

Noun

1.

ventral fin - either of a pair of fins attached to the pelvic girdle in fishes that help control the direction of movement; correspond to hind limbs of a land vertebrate pelvic fin fin - organ of locomotion and balance in fishes and some other aquatic animals